Mamiya-Sekor C 140mm F/4.5 Macro
Macro lens • Film era • Discontinued
- Announced:
- · 1976
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · MAMIYA-SEKOR MACRO C 1:4.5 f=140mm
- Class:
- · Slow 6x7 medium-format macro lens
- · Professional model (Top class)
- System:
- · Mamiya RB67 (1970)
Abbreviations
| C | Multi-layer anti-reflection coating is applied to the surfaces of lens elements. This anti-reflection coating increases light transmission, eliminates flare and ghosting, and maintains color consistence among all lens models. |
| MACRO | Macro lens. Designed specially for shooting close-ups of small subjects but can be also used in other genres of photography, not necessarily requiring focusing at close distances. Learn more |
Specification
| Optical design: | |
| Medium format 6x7 | |
| 140mm | |
| F/4.5 | |
| 7 elements in 4 groups | |
| Floating element system | |
| Mamiya RB67 [111mm] | |
| 35.7° | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| Built-in leaf shutter: | |
Type: | Mechanical Seiko #1 |
Range of shutter speeds: | 1 - 1/400 + T |
Self-timer (V): | - |
Shutter speed control: | Shutter speed ring |
Flash sync mode: | M & X sync |
Flash sync terminal: | Yes |
| Focusing: | |
| 0.754m | |
| 0.514m | |
| 1:3 | |
Focusing modes: | Manual focus only |
Manual focus control: | None; focusing from the camera |
| Physical characteristics: | |
| 800g | |
| ⌀94×83mm | |
| Accessories: | |
| Screw-type 77mm | |
| Screw-type round | |
| Not available |
Sources of data
- Manufacturer's technical data.
- Interchangeable lenses for Mamiya RB67 instructions.
- The photograph. Mamiya RB67 Pro S booklet.
- Mamiya RB67 Pro S price list by Bell & Howell (1975).
- Mamiya RB67 Pro S booklet (1977).
- Mamiya RB67 Pro-S booklet.
- Mamiya RB67 Pro-SD booklet (2 ED., PUB. 2112).
Manufacturer description
The 140mm fl4.5 for macro photography is equivalent to a 70mm lens used on a 35mm camera. The utilization of the floating element system provides improved performance in macro photography. With the lens alone, sharp macro photographs of 1/3x magnification can be taken. Used in combination with Auto Extension Tubes No.1 and No.2 it makes close-ups from 0.91x to 1.23x magnification possible.
Mamiya-Sekor C series
The second generation of lenses designed for Mamiya RB67 series medium format 6x7 SLR cameras. Introduced with the Mamiya RB67 Professional S in 1974.
- New barrel design;
- Mechanical Seiko #1 leaf shutter;
- Fully synchronized for M- and X-settings so that you can work with flash at all shutter speeds;
- Fully automatic diaphragm;
- Multi-layer anti-reflection coating;
- Standardized 77mm filter thread mount for optimized handling with accessories (except the 37/4.5 fisheye and 500/8 lenses).
Other macro lenses in the Mamiya RB67 system
| ■Mamiya RB67 mount (1) | |||||||||
| Mamiya K/L 140mm F/4.5 Macro M/L-A • 1:3 | A | 6 - 4 | 0.76m | ⌀77 | ● | ||||